// SPDX-License-Identifier: MIT// OpenZeppelin Contracts (last updated v4.9.0) (utils/Address.sol)pragmasolidity ^0.8.1;/**
* @dev Collection of functions related to the address type
*/libraryAddress{
/**
* @dev Returns true if `account` is a contract.
*
* [IMPORTANT]
* ====
* It is unsafe to assume that an address for which this function returns
* false is an externally-owned account (EOA) and not a contract.
*
* Among others, `isContract` will return false for the following
* types of addresses:
*
* - an externally-owned account
* - a contract in construction
* - an address where a contract will be created
* - an address where a contract lived, but was destroyed
*
* Furthermore, `isContract` will also return true if the target contract within
* the same transaction is already scheduled for destruction by `SELFDESTRUCT`,
* which only has an effect at the end of a transaction.
* ====
*
* [IMPORTANT]
* ====
* You shouldn't rely on `isContract` to protect against flash loan attacks!
*
* Preventing calls from contracts is highly discouraged. It breaks composability, breaks support for smart wallets
* like Gnosis Safe, and does not provide security since it can be circumvented by calling from a contract
* constructor.
* ====
*/functionisContract(address account) internalviewreturns (bool) {
// This method relies on extcodesize/address.code.length, which returns 0// for contracts in construction, since the code is only stored at the end// of the constructor execution.return account.code.length>0;
}
/**
* @dev Replacement for Solidity's `transfer`: sends `amount` wei to
* `recipient`, forwarding all available gas and reverting on errors.
*
* https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
* of certain opcodes, possibly making contracts go over the 2300 gas limit
* imposed by `transfer`, making them unable to receive funds via
* `transfer`. {sendValue} removes this limitation.
*
* https://consensys.net/diligence/blog/2019/09/stop-using-soliditys-transfer-now/[Learn more].
*
* IMPORTANT: because control is transferred to `recipient`, care must be
* taken to not create reentrancy vulnerabilities. Consider using
* {ReentrancyGuard} or the
* https://solidity.readthedocs.io/en/v0.8.0/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
*/functionsendValue(addresspayable recipient, uint256 amount) internal{
require(address(this).balance>= amount, "Address: insufficient balance");
(bool success, ) = recipient.call{value: amount}("");
require(success, "Address: unable to send value, recipient may have reverted");
}
/**
* @dev Performs a Solidity function call using a low level `call`. A
* plain `call` is an unsafe replacement for a function call: use this
* function instead.
*
* If `target` reverts with a revert reason, it is bubbled up by this
* function (like regular Solidity function calls).
*
* Returns the raw returned data. To convert to the expected return value,
* use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].
*
* Requirements:
*
* - `target` must be a contract.
* - calling `target` with `data` must not revert.
*
* _Available since v3.1._
*/functionfunctionCall(address target, bytesmemory data) internalreturns (bytesmemory) {
return functionCallWithValue(target, data, 0, "Address: low-level call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with
* `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/functionfunctionCall(address target,
bytesmemory data,
stringmemory errorMessage
) internalreturns (bytesmemory) {
return functionCallWithValue(target, data, 0, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but also transferring `value` wei to `target`.
*
* Requirements:
*
* - the calling contract must have an ETH balance of at least `value`.
* - the called Solidity function must be `payable`.
*
* _Available since v3.1._
*/functionfunctionCallWithValue(address target, bytesmemory data, uint256 value) internalreturns (bytesmemory) {
return functionCallWithValue(target, data, value, "Address: low-level call with value failed");
}
/**
* @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but
* with `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/functionfunctionCallWithValue(address target,
bytesmemory data,
uint256 value,
stringmemory errorMessage
) internalreturns (bytesmemory) {
require(address(this).balance>= value, "Address: insufficient balance for call");
(bool success, bytesmemory returndata) = target.call{value: value}(data);
return verifyCallResultFromTarget(target, success, returndata, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/functionfunctionStaticCall(address target, bytesmemory data) internalviewreturns (bytesmemory) {
return functionStaticCall(target, data, "Address: low-level static call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/functionfunctionStaticCall(address target,
bytesmemory data,
stringmemory errorMessage
) internalviewreturns (bytesmemory) {
(bool success, bytesmemory returndata) = target.staticcall(data);
return verifyCallResultFromTarget(target, success, returndata, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a delegate call.
*
* _Available since v3.4._
*/functionfunctionDelegateCall(address target, bytesmemory data) internalreturns (bytesmemory) {
return functionDelegateCall(target, data, "Address: low-level delegate call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
* but performing a delegate call.
*
* _Available since v3.4._
*/functionfunctionDelegateCall(address target,
bytesmemory data,
stringmemory errorMessage
) internalreturns (bytesmemory) {
(bool success, bytesmemory returndata) = target.delegatecall(data);
return verifyCallResultFromTarget(target, success, returndata, errorMessage);
}
/**
* @dev Tool to verify that a low level call to smart-contract was successful, and revert (either by bubbling
* the revert reason or using the provided one) in case of unsuccessful call or if target was not a contract.
*
* _Available since v4.8._
*/functionverifyCallResultFromTarget(address target,
bool success,
bytesmemory returndata,
stringmemory errorMessage
) internalviewreturns (bytesmemory) {
if (success) {
if (returndata.length==0) {
// only check isContract if the call was successful and the return data is empty// otherwise we already know that it was a contractrequire(isContract(target), "Address: call to non-contract");
}
return returndata;
} else {
_revert(returndata, errorMessage);
}
}
/**
* @dev Tool to verify that a low level call was successful, and revert if it wasn't, either by bubbling the
* revert reason or using the provided one.
*
* _Available since v4.3._
*/functionverifyCallResult(bool success,
bytesmemory returndata,
stringmemory errorMessage
) internalpurereturns (bytesmemory) {
if (success) {
return returndata;
} else {
_revert(returndata, errorMessage);
}
}
function_revert(bytesmemory returndata, stringmemory errorMessage) privatepure{
// Look for revert reason and bubble it up if presentif (returndata.length>0) {
// The easiest way to bubble the revert reason is using memory via assembly/// @solidity memory-safe-assemblyassembly {
let returndata_size :=mload(returndata)
revert(add(32, returndata), returndata_size)
}
} else {
revert(errorMessage);
}
}
}
// SPDX-License-Identifier: MIT// OpenZeppelin Contracts v4.4.1 (utils/Context.sol)pragmasolidity ^0.8.0;/**
* @dev Provides information about the current execution context, including the
* sender of the transaction and its data. While these are generally available
* via msg.sender and msg.data, they should not be accessed in such a direct
* manner, since when dealing with meta-transactions the account sending and
* paying for execution may not be the actual sender (as far as an application
* is concerned).
*
* This contract is only required for intermediate, library-like contracts.
*/abstractcontractContext{
function_msgSender() internalviewvirtualreturns (address) {
returnmsg.sender;
}
function_msgData() internalviewvirtualreturns (bytescalldata) {
returnmsg.data;
}
}
Contract Source Code
File 4 of 21: ECDSA.sol
// SPDX-License-Identifier: MIT// OpenZeppelin Contracts (last updated v4.9.0) (utils/cryptography/ECDSA.sol)pragmasolidity ^0.8.0;import"../Strings.sol";
/**
* @dev Elliptic Curve Digital Signature Algorithm (ECDSA) operations.
*
* These functions can be used to verify that a message was signed by the holder
* of the private keys of a given address.
*/libraryECDSA{
enumRecoverError {
NoError,
InvalidSignature,
InvalidSignatureLength,
InvalidSignatureS,
InvalidSignatureV // Deprecated in v4.8
}
function_throwError(RecoverError error) privatepure{
if (error == RecoverError.NoError) {
return; // no error: do nothing
} elseif (error == RecoverError.InvalidSignature) {
revert("ECDSA: invalid signature");
} elseif (error == RecoverError.InvalidSignatureLength) {
revert("ECDSA: invalid signature length");
} elseif (error == RecoverError.InvalidSignatureS) {
revert("ECDSA: invalid signature 's' value");
}
}
/**
* @dev Returns the address that signed a hashed message (`hash`) with
* `signature` or error string. This address can then be used for verification purposes.
*
* The `ecrecover` EVM opcode allows for malleable (non-unique) signatures:
* this function rejects them by requiring the `s` value to be in the lower
* half order, and the `v` value to be either 27 or 28.
*
* IMPORTANT: `hash` _must_ be the result of a hash operation for the
* verification to be secure: it is possible to craft signatures that
* recover to arbitrary addresses for non-hashed data. A safe way to ensure
* this is by receiving a hash of the original message (which may otherwise
* be too long), and then calling {toEthSignedMessageHash} on it.
*
* Documentation for signature generation:
* - with https://web3js.readthedocs.io/en/v1.3.4/web3-eth-accounts.html#sign[Web3.js]
* - with https://docs.ethers.io/v5/api/signer/#Signer-signMessage[ethers]
*
* _Available since v4.3._
*/functiontryRecover(bytes32 hash, bytesmemory signature) internalpurereturns (address, RecoverError) {
if (signature.length==65) {
bytes32 r;
bytes32 s;
uint8 v;
// ecrecover takes the signature parameters, and the only way to get them// currently is to use assembly./// @solidity memory-safe-assemblyassembly {
r :=mload(add(signature, 0x20))
s :=mload(add(signature, 0x40))
v :=byte(0, mload(add(signature, 0x60)))
}
return tryRecover(hash, v, r, s);
} else {
return (address(0), RecoverError.InvalidSignatureLength);
}
}
/**
* @dev Returns the address that signed a hashed message (`hash`) with
* `signature`. This address can then be used for verification purposes.
*
* The `ecrecover` EVM opcode allows for malleable (non-unique) signatures:
* this function rejects them by requiring the `s` value to be in the lower
* half order, and the `v` value to be either 27 or 28.
*
* IMPORTANT: `hash` _must_ be the result of a hash operation for the
* verification to be secure: it is possible to craft signatures that
* recover to arbitrary addresses for non-hashed data. A safe way to ensure
* this is by receiving a hash of the original message (which may otherwise
* be too long), and then calling {toEthSignedMessageHash} on it.
*/functionrecover(bytes32 hash, bytesmemory signature) internalpurereturns (address) {
(address recovered, RecoverError error) = tryRecover(hash, signature);
_throwError(error);
return recovered;
}
/**
* @dev Overload of {ECDSA-tryRecover} that receives the `r` and `vs` short-signature fields separately.
*
* See https://eips.ethereum.org/EIPS/eip-2098[EIP-2098 short signatures]
*
* _Available since v4.3._
*/functiontryRecover(bytes32 hash, bytes32 r, bytes32 vs) internalpurereturns (address, RecoverError) {
bytes32 s = vs &bytes32(0x7fffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff);
uint8 v =uint8((uint256(vs) >>255) +27);
return tryRecover(hash, v, r, s);
}
/**
* @dev Overload of {ECDSA-recover} that receives the `r and `vs` short-signature fields separately.
*
* _Available since v4.2._
*/functionrecover(bytes32 hash, bytes32 r, bytes32 vs) internalpurereturns (address) {
(address recovered, RecoverError error) = tryRecover(hash, r, vs);
_throwError(error);
return recovered;
}
/**
* @dev Overload of {ECDSA-tryRecover} that receives the `v`,
* `r` and `s` signature fields separately.
*
* _Available since v4.3._
*/functiontryRecover(bytes32 hash, uint8 v, bytes32 r, bytes32 s) internalpurereturns (address, RecoverError) {
// EIP-2 still allows signature malleability for ecrecover(). Remove this possibility and make the signature// unique. Appendix F in the Ethereum Yellow paper (https://ethereum.github.io/yellowpaper/paper.pdf), defines// the valid range for s in (301): 0 < s < secp256k1n ÷ 2 + 1, and for v in (302): v ∈ {27, 28}. Most// signatures from current libraries generate a unique signature with an s-value in the lower half order.//// If your library generates malleable signatures, such as s-values in the upper range, calculate a new s-value// with 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEBAAEDCE6AF48A03BBFD25E8CD0364141 - s1 and flip v from 27 to 28 or// vice versa. If your library also generates signatures with 0/1 for v instead 27/28, add 27 to v to accept// these malleable signatures as well.if (uint256(s) >0x7FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF5D576E7357A4501DDFE92F46681B20A0) {
return (address(0), RecoverError.InvalidSignatureS);
}
// If the signature is valid (and not malleable), return the signer addressaddress signer =ecrecover(hash, v, r, s);
if (signer ==address(0)) {
return (address(0), RecoverError.InvalidSignature);
}
return (signer, RecoverError.NoError);
}
/**
* @dev Overload of {ECDSA-recover} that receives the `v`,
* `r` and `s` signature fields separately.
*/functionrecover(bytes32 hash, uint8 v, bytes32 r, bytes32 s) internalpurereturns (address) {
(address recovered, RecoverError error) = tryRecover(hash, v, r, s);
_throwError(error);
return recovered;
}
/**
* @dev Returns an Ethereum Signed Message, created from a `hash`. This
* produces hash corresponding to the one signed with the
* https://eth.wiki/json-rpc/API#eth_sign[`eth_sign`]
* JSON-RPC method as part of EIP-191.
*
* See {recover}.
*/functiontoEthSignedMessageHash(bytes32 hash) internalpurereturns (bytes32 message) {
// 32 is the length in bytes of hash,// enforced by the type signature above/// @solidity memory-safe-assemblyassembly {
mstore(0x00, "\x19Ethereum Signed Message:\n32")
mstore(0x1c, hash)
message :=keccak256(0x00, 0x3c)
}
}
/**
* @dev Returns an Ethereum Signed Message, created from `s`. This
* produces hash corresponding to the one signed with the
* https://eth.wiki/json-rpc/API#eth_sign[`eth_sign`]
* JSON-RPC method as part of EIP-191.
*
* See {recover}.
*/functiontoEthSignedMessageHash(bytesmemory s) internalpurereturns (bytes32) {
returnkeccak256(abi.encodePacked("\x19Ethereum Signed Message:\n", Strings.toString(s.length), s));
}
/**
* @dev Returns an Ethereum Signed Typed Data, created from a
* `domainSeparator` and a `structHash`. This produces hash corresponding
* to the one signed with the
* https://eips.ethereum.org/EIPS/eip-712[`eth_signTypedData`]
* JSON-RPC method as part of EIP-712.
*
* See {recover}.
*/functiontoTypedDataHash(bytes32 domainSeparator, bytes32 structHash) internalpurereturns (bytes32 data) {
/// @solidity memory-safe-assemblyassembly {
let ptr :=mload(0x40)
mstore(ptr, "\x19\x01")
mstore(add(ptr, 0x02), domainSeparator)
mstore(add(ptr, 0x22), structHash)
data :=keccak256(ptr, 0x42)
}
}
/**
* @dev Returns an Ethereum Signed Data with intended validator, created from a
* `validator` and `data` according to the version 0 of EIP-191.
*
* See {recover}.
*/functiontoDataWithIntendedValidatorHash(address validator, bytesmemory data) internalpurereturns (bytes32) {
returnkeccak256(abi.encodePacked("\x19\x00", validator, data));
}
}
Contract Source Code
File 5 of 21: ECDSASigner.sol
// SPDX-License-Identifier: MITpragmasolidity ^0.8.13;import"@openzeppelin/contracts/utils/cryptography/ECDSA.sol";
import"@openzeppelin/contracts/access/Ownable.sol";
contractECDSASignerisOwnable{
addressprivate _signer;
constructor(address signer_) {
require(signer_ !=address(0), "ECDSASign: signer_ is zero address");
_signer = signer_;
}
/// @notice isValidSignature validates a message by ecrecover to ensure// it is signed by signer./// @param message_ - the raw message for signing/// @param r_ - part of signature for validating parameters integrity/// @param s_ - part of signature for validating parameters integrity/// @param v_ - part of signature for validating parameters integrityfunctionisValidSignature(bytes32 message_,
bytes32 r_,
bytes32 s_,
uint8 v_
) internalviewreturns (bool) {
address reqSigner = ECDSA.recover(
ECDSA.toEthSignedMessageHash(message_),
v_,
r_,
s_
);
return reqSigner == _signer;
}
/// @notice set the signer/// @param signer_ - the address of signerfunctionsetSigner(address signer_) externalonlyOwner{
require(signer_ !=address(0), "ECDSASign: signer_ is zero address");
_signer = signer_;
}
functionsigner() externalviewreturns (address) {
return _signer;
}
}
Contract Source Code
File 6 of 21: ERC165.sol
// SPDX-License-Identifier: MIT// OpenZeppelin Contracts v4.4.1 (utils/introspection/ERC165.sol)pragmasolidity ^0.8.0;import"./IERC165.sol";
/**
* @dev Implementation of the {IERC165} interface.
*
* Contracts that want to implement ERC165 should inherit from this contract and override {supportsInterface} to check
* for the additional interface id that will be supported. For example:
*
* ```solidity
* function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
* return interfaceId == type(MyInterface).interfaceId || super.supportsInterface(interfaceId);
* }
* ```
*
* Alternatively, {ERC165Storage} provides an easier to use but more expensive implementation.
*/abstractcontractERC165isIERC165{
/**
* @dev See {IERC165-supportsInterface}.
*/functionsupportsInterface(bytes4 interfaceId) publicviewvirtualoverridereturns (bool) {
return interfaceId ==type(IERC165).interfaceId;
}
}
Contract Source Code
File 7 of 21: ERC721.sol
// SPDX-License-Identifier: MIT// OpenZeppelin Contracts (last updated v4.9.0) (token/ERC721/ERC721.sol)pragmasolidity ^0.8.0;import"./IERC721.sol";
import"./IERC721Receiver.sol";
import"./extensions/IERC721Metadata.sol";
import"../../utils/Address.sol";
import"../../utils/Context.sol";
import"../../utils/Strings.sol";
import"../../utils/introspection/ERC165.sol";
/**
* @dev Implementation of https://eips.ethereum.org/EIPS/eip-721[ERC721] Non-Fungible Token Standard, including
* the Metadata extension, but not including the Enumerable extension, which is available separately as
* {ERC721Enumerable}.
*/contractERC721isContext, ERC165, IERC721, IERC721Metadata{
usingAddressforaddress;
usingStringsforuint256;
// Token namestringprivate _name;
// Token symbolstringprivate _symbol;
// Mapping from token ID to owner addressmapping(uint256=>address) private _owners;
// Mapping owner address to token countmapping(address=>uint256) private _balances;
// Mapping from token ID to approved addressmapping(uint256=>address) private _tokenApprovals;
// Mapping from owner to operator approvalsmapping(address=>mapping(address=>bool)) private _operatorApprovals;
/**
* @dev Initializes the contract by setting a `name` and a `symbol` to the token collection.
*/constructor(stringmemory name_, stringmemory symbol_) {
_name = name_;
_symbol = symbol_;
}
/**
* @dev See {IERC165-supportsInterface}.
*/functionsupportsInterface(bytes4 interfaceId) publicviewvirtualoverride(ERC165, IERC165) returns (bool) {
return
interfaceId ==type(IERC721).interfaceId||
interfaceId ==type(IERC721Metadata).interfaceId||super.supportsInterface(interfaceId);
}
/**
* @dev See {IERC721-balanceOf}.
*/functionbalanceOf(address owner) publicviewvirtualoverridereturns (uint256) {
require(owner !=address(0), "ERC721: address zero is not a valid owner");
return _balances[owner];
}
/**
* @dev See {IERC721-ownerOf}.
*/functionownerOf(uint256 tokenId) publicviewvirtualoverridereturns (address) {
address owner = _ownerOf(tokenId);
require(owner !=address(0), "ERC721: invalid token ID");
return owner;
}
/**
* @dev See {IERC721Metadata-name}.
*/functionname() publicviewvirtualoverridereturns (stringmemory) {
return _name;
}
/**
* @dev See {IERC721Metadata-symbol}.
*/functionsymbol() publicviewvirtualoverridereturns (stringmemory) {
return _symbol;
}
/**
* @dev See {IERC721Metadata-tokenURI}.
*/functiontokenURI(uint256 tokenId) publicviewvirtualoverridereturns (stringmemory) {
_requireMinted(tokenId);
stringmemory baseURI = _baseURI();
returnbytes(baseURI).length>0 ? string(abi.encodePacked(baseURI, tokenId.toString())) : "";
}
/**
* @dev Base URI for computing {tokenURI}. If set, the resulting URI for each
* token will be the concatenation of the `baseURI` and the `tokenId`. Empty
* by default, can be overridden in child contracts.
*/function_baseURI() internalviewvirtualreturns (stringmemory) {
return"";
}
/**
* @dev See {IERC721-approve}.
*/functionapprove(address to, uint256 tokenId) publicvirtualoverride{
address owner = ERC721.ownerOf(tokenId);
require(to != owner, "ERC721: approval to current owner");
require(
_msgSender() == owner || isApprovedForAll(owner, _msgSender()),
"ERC721: approve caller is not token owner or approved for all"
);
_approve(to, tokenId);
}
/**
* @dev See {IERC721-getApproved}.
*/functiongetApproved(uint256 tokenId) publicviewvirtualoverridereturns (address) {
_requireMinted(tokenId);
return _tokenApprovals[tokenId];
}
/**
* @dev See {IERC721-setApprovalForAll}.
*/functionsetApprovalForAll(address operator, bool approved) publicvirtualoverride{
_setApprovalForAll(_msgSender(), operator, approved);
}
/**
* @dev See {IERC721-isApprovedForAll}.
*/functionisApprovedForAll(address owner, address operator) publicviewvirtualoverridereturns (bool) {
return _operatorApprovals[owner][operator];
}
/**
* @dev See {IERC721-transferFrom}.
*/functiontransferFrom(addressfrom, address to, uint256 tokenId) publicvirtualoverride{
//solhint-disable-next-line max-line-lengthrequire(_isApprovedOrOwner(_msgSender(), tokenId), "ERC721: caller is not token owner or approved");
_transfer(from, to, tokenId);
}
/**
* @dev See {IERC721-safeTransferFrom}.
*/functionsafeTransferFrom(addressfrom, address to, uint256 tokenId) publicvirtualoverride{
safeTransferFrom(from, to, tokenId, "");
}
/**
* @dev See {IERC721-safeTransferFrom}.
*/functionsafeTransferFrom(addressfrom, address to, uint256 tokenId, bytesmemory data) publicvirtualoverride{
require(_isApprovedOrOwner(_msgSender(), tokenId), "ERC721: caller is not token owner or approved");
_safeTransfer(from, to, tokenId, data);
}
/**
* @dev Safely transfers `tokenId` token from `from` to `to`, checking first that contract recipients
* are aware of the ERC721 protocol to prevent tokens from being forever locked.
*
* `data` is additional data, it has no specified format and it is sent in call to `to`.
*
* This internal function is equivalent to {safeTransferFrom}, and can be used to e.g.
* implement alternative mechanisms to perform token transfer, such as signature-based.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must exist and be owned by `from`.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/function_safeTransfer(addressfrom, address to, uint256 tokenId, bytesmemory data) internalvirtual{
_transfer(from, to, tokenId);
require(_checkOnERC721Received(from, to, tokenId, data), "ERC721: transfer to non ERC721Receiver implementer");
}
/**
* @dev Returns the owner of the `tokenId`. Does NOT revert if token doesn't exist
*/function_ownerOf(uint256 tokenId) internalviewvirtualreturns (address) {
return _owners[tokenId];
}
/**
* @dev Returns whether `tokenId` exists.
*
* Tokens can be managed by their owner or approved accounts via {approve} or {setApprovalForAll}.
*
* Tokens start existing when they are minted (`_mint`),
* and stop existing when they are burned (`_burn`).
*/function_exists(uint256 tokenId) internalviewvirtualreturns (bool) {
return _ownerOf(tokenId) !=address(0);
}
/**
* @dev Returns whether `spender` is allowed to manage `tokenId`.
*
* Requirements:
*
* - `tokenId` must exist.
*/function_isApprovedOrOwner(address spender, uint256 tokenId) internalviewvirtualreturns (bool) {
address owner = ERC721.ownerOf(tokenId);
return (spender == owner || isApprovedForAll(owner, spender) || getApproved(tokenId) == spender);
}
/**
* @dev Safely mints `tokenId` and transfers it to `to`.
*
* Requirements:
*
* - `tokenId` must not exist.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/function_safeMint(address to, uint256 tokenId) internalvirtual{
_safeMint(to, tokenId, "");
}
/**
* @dev Same as {xref-ERC721-_safeMint-address-uint256-}[`_safeMint`], with an additional `data` parameter which is
* forwarded in {IERC721Receiver-onERC721Received} to contract recipients.
*/function_safeMint(address to, uint256 tokenId, bytesmemory data) internalvirtual{
_mint(to, tokenId);
require(
_checkOnERC721Received(address(0), to, tokenId, data),
"ERC721: transfer to non ERC721Receiver implementer"
);
}
/**
* @dev Mints `tokenId` and transfers it to `to`.
*
* WARNING: Usage of this method is discouraged, use {_safeMint} whenever possible
*
* Requirements:
*
* - `tokenId` must not exist.
* - `to` cannot be the zero address.
*
* Emits a {Transfer} event.
*/function_mint(address to, uint256 tokenId) internalvirtual{
require(to !=address(0), "ERC721: mint to the zero address");
require(!_exists(tokenId), "ERC721: token already minted");
_beforeTokenTransfer(address(0), to, tokenId, 1);
// Check that tokenId was not minted by `_beforeTokenTransfer` hookrequire(!_exists(tokenId), "ERC721: token already minted");
unchecked {
// Will not overflow unless all 2**256 token ids are minted to the same owner.// Given that tokens are minted one by one, it is impossible in practice that// this ever happens. Might change if we allow batch minting.// The ERC fails to describe this case.
_balances[to] +=1;
}
_owners[tokenId] = to;
emit Transfer(address(0), to, tokenId);
_afterTokenTransfer(address(0), to, tokenId, 1);
}
/**
* @dev Destroys `tokenId`.
* The approval is cleared when the token is burned.
* This is an internal function that does not check if the sender is authorized to operate on the token.
*
* Requirements:
*
* - `tokenId` must exist.
*
* Emits a {Transfer} event.
*/function_burn(uint256 tokenId) internalvirtual{
address owner = ERC721.ownerOf(tokenId);
_beforeTokenTransfer(owner, address(0), tokenId, 1);
// Update ownership in case tokenId was transferred by `_beforeTokenTransfer` hook
owner = ERC721.ownerOf(tokenId);
// Clear approvalsdelete _tokenApprovals[tokenId];
unchecked {
// Cannot overflow, as that would require more tokens to be burned/transferred// out than the owner initially received through minting and transferring in.
_balances[owner] -=1;
}
delete _owners[tokenId];
emit Transfer(owner, address(0), tokenId);
_afterTokenTransfer(owner, address(0), tokenId, 1);
}
/**
* @dev Transfers `tokenId` from `from` to `to`.
* As opposed to {transferFrom}, this imposes no restrictions on msg.sender.
*
* Requirements:
*
* - `to` cannot be the zero address.
* - `tokenId` token must be owned by `from`.
*
* Emits a {Transfer} event.
*/function_transfer(addressfrom, address to, uint256 tokenId) internalvirtual{
require(ERC721.ownerOf(tokenId) ==from, "ERC721: transfer from incorrect owner");
require(to !=address(0), "ERC721: transfer to the zero address");
_beforeTokenTransfer(from, to, tokenId, 1);
// Check that tokenId was not transferred by `_beforeTokenTransfer` hookrequire(ERC721.ownerOf(tokenId) ==from, "ERC721: transfer from incorrect owner");
// Clear approvals from the previous ownerdelete _tokenApprovals[tokenId];
unchecked {
// `_balances[from]` cannot overflow for the same reason as described in `_burn`:// `from`'s balance is the number of token held, which is at least one before the current// transfer.// `_balances[to]` could overflow in the conditions described in `_mint`. That would require// all 2**256 token ids to be minted, which in practice is impossible.
_balances[from] -=1;
_balances[to] +=1;
}
_owners[tokenId] = to;
emit Transfer(from, to, tokenId);
_afterTokenTransfer(from, to, tokenId, 1);
}
/**
* @dev Approve `to` to operate on `tokenId`
*
* Emits an {Approval} event.
*/function_approve(address to, uint256 tokenId) internalvirtual{
_tokenApprovals[tokenId] = to;
emit Approval(ERC721.ownerOf(tokenId), to, tokenId);
}
/**
* @dev Approve `operator` to operate on all of `owner` tokens
*
* Emits an {ApprovalForAll} event.
*/function_setApprovalForAll(address owner, address operator, bool approved) internalvirtual{
require(owner != operator, "ERC721: approve to caller");
_operatorApprovals[owner][operator] = approved;
emit ApprovalForAll(owner, operator, approved);
}
/**
* @dev Reverts if the `tokenId` has not been minted yet.
*/function_requireMinted(uint256 tokenId) internalviewvirtual{
require(_exists(tokenId), "ERC721: invalid token ID");
}
/**
* @dev Internal function to invoke {IERC721Receiver-onERC721Received} on a target address.
* The call is not executed if the target address is not a contract.
*
* @param from address representing the previous owner of the given token ID
* @param to target address that will receive the tokens
* @param tokenId uint256 ID of the token to be transferred
* @param data bytes optional data to send along with the call
* @return bool whether the call correctly returned the expected magic value
*/function_checkOnERC721Received(addressfrom,
address to,
uint256 tokenId,
bytesmemory data
) privatereturns (bool) {
if (to.isContract()) {
try IERC721Receiver(to).onERC721Received(_msgSender(), from, tokenId, data) returns (bytes4 retval) {
return retval == IERC721Receiver.onERC721Received.selector;
} catch (bytesmemory reason) {
if (reason.length==0) {
revert("ERC721: transfer to non ERC721Receiver implementer");
} else {
/// @solidity memory-safe-assemblyassembly {
revert(add(32, reason), mload(reason))
}
}
}
} else {
returntrue;
}
}
/**
* @dev Hook that is called before any token transfer. This includes minting and burning. If {ERC721Consecutive} is
* used, the hook may be called as part of a consecutive (batch) mint, as indicated by `batchSize` greater than 1.
*
* Calling conditions:
*
* - When `from` and `to` are both non-zero, ``from``'s tokens will be transferred to `to`.
* - When `from` is zero, the tokens will be minted for `to`.
* - When `to` is zero, ``from``'s tokens will be burned.
* - `from` and `to` are never both zero.
* - `batchSize` is non-zero.
*
* To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
*/function_beforeTokenTransfer(addressfrom, address to, uint256 firstTokenId, uint256 batchSize) internalvirtual{}
/**
* @dev Hook that is called after any token transfer. This includes minting and burning. If {ERC721Consecutive} is
* used, the hook may be called as part of a consecutive (batch) mint, as indicated by `batchSize` greater than 1.
*
* Calling conditions:
*
* - When `from` and `to` are both non-zero, ``from``'s tokens were transferred to `to`.
* - When `from` is zero, the tokens were minted for `to`.
* - When `to` is zero, ``from``'s tokens were burned.
* - `from` and `to` are never both zero.
* - `batchSize` is non-zero.
*
* To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
*/function_afterTokenTransfer(addressfrom, address to, uint256 firstTokenId, uint256 batchSize) internalvirtual{}
/**
* @dev Unsafe write access to the balances, used by extensions that "mint" tokens using an {ownerOf} override.
*
* WARNING: Anyone calling this MUST ensure that the balances remain consistent with the ownership. The invariant
* being that for any address `a` the value returned by `balanceOf(a)` must be equal to the number of tokens such
* that `ownerOf(tokenId)` is `a`.
*/// solhint-disable-next-line func-name-mixedcasefunction__unsafe_increaseBalance(address account, uint256 amount) internal{
_balances[account] += amount;
}
}
Contract Source Code
File 8 of 21: FeralfileArtworkV4.sol
// SPDX-License-Identifier: MITpragmasolidity ^0.8.13;import"@openzeppelin/contracts/token/ERC721/ERC721.sol";
import"@openzeppelin/contracts/utils/Strings.sol";
import"./Authorizable.sol";
import"./UpdateableOperatorFilterer.sol";
import"./FeralfileSaleData.sol";
import"./ECDSASigner.sol";
import"./IFeralfileVault.sol";
contractFeralfileExhibitionV4isERC721,
Authorizable,
UpdateableOperatorFilterer,
FeralfileSaleData,
ECDSASigner{
usingStringsforuint256;
structArtwork {
uint256 seriesId;
uint256 tokenId;
}
structMintData {
uint256 seriesId;
uint256 tokenId;
address owner;
}
// version code of contractstringpublicconstant codeVersion ="FeralfileExhibitionV4";
// token base URIstringpublic tokenBaseURI;
// contract URIstringpublic contractURI;
// total supplyuint256public totalSupply;
// burnableboolpublic burnable;
// bridgeableboolpublic bridgeable;
// sellingboolprivate _selling;
// mintableboolpublic mintable =true;
// cost receiveraddresspublic costReceiver;
// vault contract instance
IFeralfileVault public vault;
// series max suppliesmapping(uint256=>uint256) internal _seriesMaxSupplies;
// series total suppliesmapping(uint256=>uint256) internal _seriesTotalSupplies;
// all artworksmapping(uint256=> Artwork) internal _allArtworks;
// Mapping from owner to list of owned token IDsmapping(address=>uint256[]) private _ownedTokens;
// Mapping from token ID to index of the owner tokens listmapping(uint256=>uint256) private _ownedTokensIndex;
constructor(stringmemory name_,
stringmemory symbol_,
bool burnable_,
bool bridgeable_,
address signer_,
address vault_,
address costReceiver_,
stringmemory contractURI_,
uint256[] memory seriesIds_,
uint256[] memory seriesMaxSupplies_
) ERC721(name_, symbol_) ECDSASigner(signer_) {
// validationsrequire(
bytes(name_).length>0,
"FeralfileExhibitionV4: name_ is empty"
);
require(
bytes(symbol_).length>0,
"FeralfileExhibitionV4: symbol_ is empty"
);
require(
vault_ !=address(0),
"FeralfileExhibitionV4: vaultAddress_ is zero address"
);
require(
costReceiver_ !=address(0),
"FeralfileExhibitionV4: costReceiver_ is zero address"
);
require(
bytes(contractURI_).length>0,
"FeralfileExhibitionV4: contractURI_ is empty"
);
require(
seriesIds_.length>0,
"FeralfileExhibitionV4: seriesIds_ is empty"
);
require(
seriesMaxSupplies_.length>0,
"FeralfileExhibitionV4: _seriesMaxSupplies is empty"
);
require(
seriesIds_.length== seriesMaxSupplies_.length,
"FeralfileExhibitionV4: seriesMaxSupplies_ and seriesIds_ lengths are not the same"
);
burnable = burnable_;
bridgeable = bridgeable_;
costReceiver = costReceiver_;
vault = IFeralfileVault(payable(vault_));
contractURI = contractURI_;
// initialize max supply mapfor (uint256 i =0; i < seriesIds_.length; i++) {
// Check duplicate with othersfor (uint256 j = i +1; j < seriesIds_.length; j++) {
if (seriesIds_[i] == seriesIds_[j]) {
revert("FeralfileExhibitionV4: duplicate seriesId");
}
}
require(
seriesMaxSupplies_[i] >0,
"FeralfileExhibitionV4: zero max supply"
);
_seriesMaxSupplies[seriesIds_[i]] = seriesMaxSupplies_[i];
}
}
/**
* @dev See {IERC721Enumerable-tokenOfOwnerByIndex}.
*/functiontokenOfOwnerByIndex(address owner,
uint256 index
) externalviewreturns (uint256) {
require(
index < ERC721.balanceOf(owner),
"ERC721Enumerable: owner index out of bounds"
);
return _ownedTokens[owner][index];
}
/// @notice Get token ID from ownerfunctiontokensOfOwner(address owner
) externalviewreturns (uint256[] memory) {
return _ownedTokens[owner];
}
/// @notice Get series max supply/// @param seriesId a series ID/// @return uint256 the max supplyfunctionseriesMaxSupply(uint256 seriesId
) externalviewvirtualreturns (uint256) {
return _seriesMaxSupplies[seriesId];
}
/// @notice Get series total supply/// @param seriesId a series ID/// @return uint256 the total supplyfunctionseriesTotalSupply(uint256 seriesId
) externalviewvirtualreturns (uint256) {
return _seriesTotalSupplies[seriesId];
}
/// @notice Get artwork data/// @param tokenId a token ID representing the artwork/// @return Artwork the Artwork objectfunctiongetArtwork(uint256 tokenId
) externalviewvirtualreturns (Artwork memory) {
require(_exists(tokenId), "ERC721: invalid token ID");
return _allArtworks[tokenId];
}
/// @notice Set vault contract/// @dev don't allow to set vault as zero addressfunctionsetVault(address vault_) externalonlyOwner{
require(
vault_ !=address(0),
"FeralfileExhibitionV4: vault_ is zero address"
);
vault = IFeralfileVault(payable(vault_));
}
/// @notice Return flag _selling;functionselling() externalviewreturns (bool) {
return _selling;
}
function_checkContractOwnedToken() privateview{
uint256 balance = balanceOf(address(this));
require(
balance >0,
"FeralfileExhibitionV4: No token owned by the contract"
);
}
/// @notice Start token salefunctionstartSale() externalonlyOwner{
mintable =false;
resumeSale();
}
/// @notice Resume token salefunctionresumeSale() publiconlyOwner{
require(
!mintable,
"FeralfileExhibitionV4: mintable required to be false"
);
require(
!_selling,
"FeralfileExhibitionV4: _selling required to be false"
);
_checkContractOwnedToken();
_selling =true;
}
/// @notice Pause token salefunctionpauseSale() publiconlyOwner{
require(
!mintable,
"FeralfileExhibitionV4: mintable required to be false"
);
require(
_selling,
"FeralfileExhibitionV4: _selling required to be true"
);
_selling =false;
}
/// @notice Stop token sale and burn remaining tokensfunctionstopSaleAndBurn() externalonlyOwner{
pauseSale();
// burn remaining tokensuint256[] memory tokenIds = _ownedTokens[address(this)];
for (uint256 i =0; i < tokenIds.length; i++) {
_burnArtwork(tokenIds[i]);
}
}
/// @notice Stop token selling and transfer remaining tokens back to the underlying addressesfunctionstopSaleAndTransfer(uint256[] memory seriesIds,
address[] memory recipientAddresses
) externalonlyOwner{
require(
seriesIds.length>0&& recipientAddresses.length>0,
"FeralfileExhibitionV4: seriesIds or recipientAddresses length is zero"
);
require(
seriesIds.length== recipientAddresses.length,
"FeralfileExhibitionV4: seriesIds length is different from recipientAddresses"
);
pauseSale();
// transfer tokens back to the addressesaddressfrom=address(this);
uint256[] memory tokenIds = _ownedTokens[from];
for (uint256 i =0; i < tokenIds.length; i++) {
uint256 tokenId = tokenIds[i];
Artwork memory artwork = _allArtworks[tokenId];
for (uint16 j =0; j < seriesIds.length; j++) {
if (artwork.seriesId == seriesIds[j]) {
address to = recipientAddresses[j];
_safeTransfer(from, to, tokenId, "");
break;
}
}
}
require(
balanceOf(from) ==0,
"FeralfileExhibitionV4: Token for sale balance has to be zero"
);
}
/// @dev override for OperatorFilterRegistryfunctionsetApprovalForAll(address operator,
bool approved
) publicoverride(ERC721) onlyAllowedOperatorApproval(operator) {
super.setApprovalForAll(operator, approved);
}
/// @dev override for OperatorFilterRegistryfunctionapprove(address operator,
uint256 tokenId
) publicoverride(ERC721) onlyAllowedOperatorApproval(operator) {
super.approve(operator, tokenId);
}
/// @dev override for OperatorFilterRegistryfunctiontransferFrom(addressfrom,
address to,
uint256 tokenId
) publicoverride(ERC721) onlyAllowedOperator(from) {
require(
to !=address(this),
"FeralfileExhibitionV4: Contract isn't allowed to receive token"
);
super.transferFrom(from, to, tokenId);
}
/// @dev override for OperatorFilterRegistryfunctionsafeTransferFrom(addressfrom,
address to,
uint256 tokenId
) publicoverride(ERC721) onlyAllowedOperator(from) {
require(
to !=address(this),
"FeralfileExhibitionV4: Contract isn't allowed to receive token"
);
super.safeTransferFrom(from, to, tokenId);
}
/// @dev override for OperatorFilterRegistryfunctionsafeTransferFrom(addressfrom,
address to,
uint256 tokenId,
bytesmemory data
) publicoverride(ERC721) onlyAllowedOperator(from) {
require(
to !=address(this),
"FeralfileExhibitionV4: Contract isn't allowed to receive token"
);
super.safeTransferFrom(from, to, tokenId, data);
}
/// @notice A distinct Uniform Resource Identifier (URI) for a given asset.functiontokenURI(uint256 tokenId
) publicviewvirtualoverridereturns (stringmemory) {
require(
bytes(tokenBaseURI).length>0,
"ERC721Metadata: _tokenBaseURI is empty"
);
require(
_exists(tokenId),
"ERC721Metadata: URI query for nonexistent token"
);
returnstring(abi.encodePacked(tokenBaseURI, "/", tokenId.toString()));
}
/// @notice Update the base URI for all tokensfunctionsetTokenBaseURI(stringmemory baseURI_) externalonlyOwner{
require(
bytes(baseURI_).length>0,
"ERC721Metadata: baseURI_ is empty"
);
tokenBaseURI = baseURI_;
}
/// @notice the cost receiver address/// @param costReceiver_ - the address of cost receiverfunctionsetCostReceiver(address costReceiver_) externalonlyOwner{
require(
costReceiver_ !=address(0),
"FeralfileExhibitionV4: costReceiver_ is zero address"
);
costReceiver = costReceiver_;
}
/// @notice pay to get artworks to a destination address. The pricing, costs and other details is included in the saleData/// @param r_ - part of signature for validating parameters integrity/// @param s_ - part of signature for validating parameters integrity/// @param v_ - part of signature for validating parameters integrity/// @param saleData_ - the sale datafunctionbuyArtworks(bytes32 r_,
bytes32 s_,
uint8 v_,
SaleData calldata saleData_
) externalpayable{
require(_selling, "FeralfileExhibitionV4: sale is not started");
_checkContractOwnedToken();
validateSaleData(saleData_);
saleData_.payByVaultContract
? vault.payForSale(r_, s_, v_, saleData_)
: require(
saleData_.price ==msg.value,
"FeralfileExhibitionV4: invalid payment amount"
);
bytes32 message =keccak256(
abi.encode(block.chainid, address(this), saleData_)
);
require(
isValidSignature(message, r_, s_, v_),
"FeralfileExhibitionV4: invalid signature"
);
uint256 itemRevenue;
if (saleData_.price > saleData_.cost) {
itemRevenue =
(saleData_.price - saleData_.cost) /
saleData_.tokenIds.length;
}
uint256 distributedRevenue;
uint256 platformRevenue;
for (uint256 i =0; i < saleData_.tokenIds.length; i++) {
// send NFT
_safeTransfer(
address(this),
saleData_.destination,
saleData_.tokenIds[i],
""
);
if (itemRevenue >0) {
// distribute royaltyfor (
uint256 j =0;
j < saleData_.revenueShares[i].length;
j++
) {
uint256 rev = (itemRevenue *
saleData_.revenueShares[i][j].bps) /10000;
if (
saleData_.revenueShares[i][j].recipient == costReceiver
) {
platformRevenue += rev;
continue;
}
distributedRevenue += rev;
payable(saleData_.revenueShares[i][j].recipient).transfer(
rev
);
}
}
emit BuyArtwork(saleData_.destination, saleData_.tokenIds[i]);
}
require(
saleData_.price - saleData_.cost >=
distributedRevenue + platformRevenue,
"FeralfileExhibitionV4: total bps over 10,000"
);
// Transfer cost, platform revenue and remaining fundsuint256 leftOver = saleData_.price - distributedRevenue;
if (leftOver >0) {
payable(costReceiver).transfer(leftOver);
}
}
/// @notice utility function for checking the series existsfunction_seriesExists(uint256 seriesId) privateviewreturns (bool) {
return _seriesMaxSupplies[seriesId] >0;
}
/// @dev Modify from ERC721Enumerablefunction_beforeTokenTransfer(addressfrom,
address to,
uint256 firstTokenId,
uint256 batchSize
) internalvirtualoverride{
super._beforeTokenTransfer(from, to, firstTokenId, batchSize);
if (batchSize >1) {
// Will only trigger during construction. Batch transferring (minting) is not available afterwards.revert("ERC721Enumerable: consecutive transfers not supported");
}
uint256 tokenId = firstTokenId;
if (from!=address(0) &&from!= to) {
_removeTokenFromOwnerEnumeration(from, tokenId);
}
if (to !=address(0) && to !=from) {
_addTokenToOwnerEnumeration(to, tokenId);
}
}
/// @dev Modify from ERC721Enumerablefunction_removeTokenFromOwnerEnumeration(addressfrom,
uint256 tokenId
) private{
// To prevent a gap in from's tokens array, we store the last token in the index of the token to delete, and// then delete the last slot (swap and pop).uint256 lastTokenIndex = ERC721.balanceOf(from) -1;
uint256 tokenIndex = _ownedTokensIndex[tokenId];
// When the token to delete is the last token, the swap operation is unnecessaryif (tokenIndex != lastTokenIndex) {
uint256 lastTokenId = _ownedTokens[from][lastTokenIndex];
_ownedTokens[from][tokenIndex] = lastTokenId; // Move the last token to the slot of the to-delete token
_ownedTokensIndex[lastTokenId] = tokenIndex; // Update the moved token's index
}
delete _ownedTokensIndex[tokenId];
_ownedTokens[from].pop();
}
/// @dev Modify from ERC721Enumerablefunction_addTokenToOwnerEnumeration(address to, uint256 tokenId) private{
uint256[] storage tokens = _ownedTokens[to];
uint256 length = tokens.length;
tokens.push(tokenId);
_ownedTokensIndex[tokenId] = length;
}
/// @notice Mint new collection of Artwork/// @dev the function iterates over the array of MintData to call the internal function _mintArtwork/// @param data an array of MintDatafunctionmintArtworks(
MintData[] calldata data
) externalvirtualonlyAuthorized{
require(
mintable,
"FeralfileExhibitionV4: contract doesn't allow to mint"
);
for (uint256 i =0; i < data.length; i++) {
_mintArtwork(data[i].seriesId, data[i].tokenId, data[i].owner);
}
}
function_mintArtwork(uint256 seriesId,
uint256 tokenId,
address owner
) internal{
// pre-condition checksrequire(
_seriesExists(seriesId),
string(
abi.encodePacked(
"FeralfileExhibitionV4: seriesId doesn't exist: ",
Strings.toString(seriesId)
)
)
);
require(
_seriesTotalSupplies[seriesId] < _seriesMaxSupplies[seriesId],
"FeralfileExhibitionV4: no slots available"
);
// mint
totalSupply +=1;
_seriesTotalSupplies[seriesId] +=1;
_allArtworks[tokenId] = Artwork(seriesId, tokenId);
_mint(owner, tokenId);
// emit eventemit NewArtwork(owner, seriesId, tokenId);
}
/// @notice Burn a collection of artworks/// @dev the function iterates over the array of token ID to call the internal function _burnArtwork/// @param tokenIds an array of token IDfunctionburnArtworks(uint256[] memory tokenIds) external{
require(burnable, "FeralfileExhibitionV4: token is not burnable");
for (uint256 i =0; i < tokenIds.length; i++) {
require(
_isApprovedOrOwner(_msgSender(), tokenIds[i]),
"ERC721: caller is not token owner or approved"
);
_burnArtwork(tokenIds[i]);
}
}
function_burnArtwork(uint256 tokenId) internal{
require(_exists(tokenId), "ERC721: invalid token ID");
// burn artwork
Artwork memory artwork = _allArtworks[tokenId];
_seriesTotalSupplies[artwork.seriesId] -=1;
totalSupply -=1;
delete _allArtworks[tokenId];
_burn(tokenId);
// emit eventemit BurnArtwork(tokenId);
}
/// @notice able to receive fund from vault contractreceive() externalpayable{
require(
msg.sender==address(vault),
"FeralfileExhibitionV4: only accept fund from vault contract."
);
}
/// @notice Event emitted when new Artwork has been mintedeventNewArtwork(addressindexed owner,
uint256indexed seriesId,
uint256indexed tokenId
);
/// @notice Event emitted when Artwork has been burnedeventBurnArtwork(uint256indexed tokenId);
/// @notice Event emitted when Artwork has been soldeventBuyArtwork(addressindexed buyer, uint256indexed tokenId);
}
Contract Source Code
File 9 of 21: FeralfileSaleData.sol
// SPDX-License-Identifier: MITpragmasolidity ^0.8.13;import"./IFeralfileSaleData.sol";
contractFeralfileSaleDataisIFeralfileSaleData{
functionvalidateSaleData(SaleData calldata saleData_) internalview{
require(
saleData_.tokenIds.length>0,
"FeralfileSaleData: tokenIds is empty"
);
require(
saleData_.tokenIds.length== saleData_.revenueShares.length,
"FeralfileSaleData: tokenIds and revenueShares length mismatch"
);
require(
saleData_.expiryTime >block.timestamp,
"FeralfileSaleData: sale is expired"
);
}
}
Contract Source Code
File 10 of 21: IERC165.sol
// SPDX-License-Identifier: MIT// OpenZeppelin Contracts v4.4.1 (utils/introspection/IERC165.sol)pragmasolidity ^0.8.0;/**
* @dev Interface of the ERC165 standard, as defined in the
* https://eips.ethereum.org/EIPS/eip-165[EIP].
*
* Implementers can declare support of contract interfaces, which can then be
* queried by others ({ERC165Checker}).
*
* For an implementation, see {ERC165}.
*/interfaceIERC165{
/**
* @dev Returns true if this contract implements the interface defined by
* `interfaceId`. See the corresponding
* https://eips.ethereum.org/EIPS/eip-165#how-interfaces-are-identified[EIP section]
* to learn more about how these ids are created.
*
* This function call must use less than 30 000 gas.
*/functionsupportsInterface(bytes4 interfaceId) externalviewreturns (bool);
}
Contract Source Code
File 11 of 21: IERC721.sol
// SPDX-License-Identifier: MIT// OpenZeppelin Contracts (last updated v4.9.0) (token/ERC721/IERC721.sol)pragmasolidity ^0.8.0;import"../../utils/introspection/IERC165.sol";
/**
* @dev Required interface of an ERC721 compliant contract.
*/interfaceIERC721isIERC165{
/**
* @dev Emitted when `tokenId` token is transferred from `from` to `to`.
*/eventTransfer(addressindexedfrom, addressindexed to, uint256indexed tokenId);
/**
* @dev Emitted when `owner` enables `approved` to manage the `tokenId` token.
*/eventApproval(addressindexed owner, addressindexed approved, uint256indexed tokenId);
/**
* @dev Emitted when `owner` enables or disables (`approved`) `operator` to manage all of its assets.
*/eventApprovalForAll(addressindexed owner, addressindexed operator, bool approved);
/**
* @dev Returns the number of tokens in ``owner``'s account.
*/functionbalanceOf(address owner) externalviewreturns (uint256 balance);
/**
* @dev Returns the owner of the `tokenId` token.
*
* Requirements:
*
* - `tokenId` must exist.
*/functionownerOf(uint256 tokenId) externalviewreturns (address owner);
/**
* @dev Safely transfers `tokenId` token from `from` to `to`.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must exist and be owned by `from`.
* - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/functionsafeTransferFrom(addressfrom, address to, uint256 tokenId, bytescalldata data) external;
/**
* @dev Safely transfers `tokenId` token from `from` to `to`, checking first that contract recipients
* are aware of the ERC721 protocol to prevent tokens from being forever locked.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must exist and be owned by `from`.
* - If the caller is not `from`, it must have been allowed to move this token by either {approve} or {setApprovalForAll}.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/functionsafeTransferFrom(addressfrom, address to, uint256 tokenId) external;
/**
* @dev Transfers `tokenId` token from `from` to `to`.
*
* WARNING: Note that the caller is responsible to confirm that the recipient is capable of receiving ERC721
* or else they may be permanently lost. Usage of {safeTransferFrom} prevents loss, though the caller must
* understand this adds an external call which potentially creates a reentrancy vulnerability.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must be owned by `from`.
* - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}.
*
* Emits a {Transfer} event.
*/functiontransferFrom(addressfrom, address to, uint256 tokenId) external;
/**
* @dev Gives permission to `to` to transfer `tokenId` token to another account.
* The approval is cleared when the token is transferred.
*
* Only a single account can be approved at a time, so approving the zero address clears previous approvals.
*
* Requirements:
*
* - The caller must own the token or be an approved operator.
* - `tokenId` must exist.
*
* Emits an {Approval} event.
*/functionapprove(address to, uint256 tokenId) external;
/**
* @dev Approve or remove `operator` as an operator for the caller.
* Operators can call {transferFrom} or {safeTransferFrom} for any token owned by the caller.
*
* Requirements:
*
* - The `operator` cannot be the caller.
*
* Emits an {ApprovalForAll} event.
*/functionsetApprovalForAll(address operator, bool approved) external;
/**
* @dev Returns the account approved for `tokenId` token.
*
* Requirements:
*
* - `tokenId` must exist.
*/functiongetApproved(uint256 tokenId) externalviewreturns (address operator);
/**
* @dev Returns if the `operator` is allowed to manage all of the assets of `owner`.
*
* See {setApprovalForAll}
*/functionisApprovedForAll(address owner, address operator) externalviewreturns (bool);
}
// SPDX-License-Identifier: MIT// OpenZeppelin Contracts (last updated v4.6.0) (token/ERC721/IERC721Receiver.sol)pragmasolidity ^0.8.0;/**
* @title ERC721 token receiver interface
* @dev Interface for any contract that wants to support safeTransfers
* from ERC721 asset contracts.
*/interfaceIERC721Receiver{
/**
* @dev Whenever an {IERC721} `tokenId` token is transferred to this contract via {IERC721-safeTransferFrom}
* by `operator` from `from`, this function is called.
*
* It must return its Solidity selector to confirm the token transfer.
* If any other value is returned or the interface is not implemented by the recipient, the transfer will be reverted.
*
* The selector can be obtained in Solidity with `IERC721Receiver.onERC721Received.selector`.
*/functiononERC721Received(address operator,
addressfrom,
uint256 tokenId,
bytescalldata data
) externalreturns (bytes4);
}
Contract Source Code
File 14 of 21: IFeralfileSaleData.sol
// SPDX-License-Identifier: MITpragmasolidity ^0.8.13;interfaceIFeralfileSaleData{
structRevenueShare {
address recipient;
uint256 bps;
}
structSaleData {
uint256 price; // in weiuint256 cost; // in weiuint256 expiryTime;
address destination;
uint256[] tokenIds;
RevenueShare[][] revenueShares; // address and royalty bps (500 means 5%)bool payByVaultContract; // get eth from vault contract, used by credit card pay that proxy by ITX
}
}
// SPDX-License-Identifier: MIT// OpenZeppelin Contracts (last updated v4.9.0) (utils/math/Math.sol)pragmasolidity ^0.8.0;/**
* @dev Standard math utilities missing in the Solidity language.
*/libraryMath{
enumRounding {
Down, // Toward negative infinity
Up, // Toward infinity
Zero // Toward zero
}
/**
* @dev Returns the largest of two numbers.
*/functionmax(uint256 a, uint256 b) internalpurereturns (uint256) {
return a > b ? a : b;
}
/**
* @dev Returns the smallest of two numbers.
*/functionmin(uint256 a, uint256 b) internalpurereturns (uint256) {
return a < b ? a : b;
}
/**
* @dev Returns the average of two numbers. The result is rounded towards
* zero.
*/functionaverage(uint256 a, uint256 b) internalpurereturns (uint256) {
// (a + b) / 2 can overflow.return (a & b) + (a ^ b) /2;
}
/**
* @dev Returns the ceiling of the division of two numbers.
*
* This differs from standard division with `/` in that it rounds up instead
* of rounding down.
*/functionceilDiv(uint256 a, uint256 b) internalpurereturns (uint256) {
// (a + b - 1) / b can overflow on addition, so we distribute.return a ==0 ? 0 : (a -1) / b +1;
}
/**
* @notice Calculates floor(x * y / denominator) with full precision. Throws if result overflows a uint256 or denominator == 0
* @dev Original credit to Remco Bloemen under MIT license (https://xn--2-umb.com/21/muldiv)
* with further edits by Uniswap Labs also under MIT license.
*/functionmulDiv(uint256 x, uint256 y, uint256 denominator) internalpurereturns (uint256 result) {
unchecked {
// 512-bit multiply [prod1 prod0] = x * y. Compute the product mod 2^256 and mod 2^256 - 1, then use// use the Chinese Remainder Theorem to reconstruct the 512 bit result. The result is stored in two 256// variables such that product = prod1 * 2^256 + prod0.uint256 prod0; // Least significant 256 bits of the productuint256 prod1; // Most significant 256 bits of the productassembly {
let mm :=mulmod(x, y, not(0))
prod0 :=mul(x, y)
prod1 :=sub(sub(mm, prod0), lt(mm, prod0))
}
// Handle non-overflow cases, 256 by 256 division.if (prod1 ==0) {
// Solidity will revert if denominator == 0, unlike the div opcode on its own.// The surrounding unchecked block does not change this fact.// See https://docs.soliditylang.org/en/latest/control-structures.html#checked-or-unchecked-arithmetic.return prod0 / denominator;
}
// Make sure the result is less than 2^256. Also prevents denominator == 0.require(denominator > prod1, "Math: mulDiv overflow");
///////////////////////////////////////////////// 512 by 256 division.///////////////////////////////////////////////// Make division exact by subtracting the remainder from [prod1 prod0].uint256 remainder;
assembly {
// Compute remainder using mulmod.
remainder :=mulmod(x, y, denominator)
// Subtract 256 bit number from 512 bit number.
prod1 :=sub(prod1, gt(remainder, prod0))
prod0 :=sub(prod0, remainder)
}
// Factor powers of two out of denominator and compute largest power of two divisor of denominator. Always >= 1.// See https://cs.stackexchange.com/q/138556/92363.// Does not overflow because the denominator cannot be zero at this stage in the function.uint256 twos = denominator & (~denominator +1);
assembly {
// Divide denominator by twos.
denominator :=div(denominator, twos)
// Divide [prod1 prod0] by twos.
prod0 :=div(prod0, twos)
// Flip twos such that it is 2^256 / twos. If twos is zero, then it becomes one.
twos :=add(div(sub(0, twos), twos), 1)
}
// Shift in bits from prod1 into prod0.
prod0 |= prod1 * twos;
// Invert denominator mod 2^256. Now that denominator is an odd number, it has an inverse modulo 2^256 such// that denominator * inv = 1 mod 2^256. Compute the inverse by starting with a seed that is correct for// four bits. That is, denominator * inv = 1 mod 2^4.uint256 inverse = (3* denominator) ^2;
// Use the Newton-Raphson iteration to improve the precision. Thanks to Hensel's lifting lemma, this also works// in modular arithmetic, doubling the correct bits in each step.
inverse *=2- denominator * inverse; // inverse mod 2^8
inverse *=2- denominator * inverse; // inverse mod 2^16
inverse *=2- denominator * inverse; // inverse mod 2^32
inverse *=2- denominator * inverse; // inverse mod 2^64
inverse *=2- denominator * inverse; // inverse mod 2^128
inverse *=2- denominator * inverse; // inverse mod 2^256// Because the division is now exact we can divide by multiplying with the modular inverse of denominator.// This will give us the correct result modulo 2^256. Since the preconditions guarantee that the outcome is// less than 2^256, this is the final result. We don't need to compute the high bits of the result and prod1// is no longer required.
result = prod0 * inverse;
return result;
}
}
/**
* @notice Calculates x * y / denominator with full precision, following the selected rounding direction.
*/functionmulDiv(uint256 x, uint256 y, uint256 denominator, Rounding rounding) internalpurereturns (uint256) {
uint256 result = mulDiv(x, y, denominator);
if (rounding == Rounding.Up &&mulmod(x, y, denominator) >0) {
result +=1;
}
return result;
}
/**
* @dev Returns the square root of a number. If the number is not a perfect square, the value is rounded down.
*
* Inspired by Henry S. Warren, Jr.'s "Hacker's Delight" (Chapter 11).
*/functionsqrt(uint256 a) internalpurereturns (uint256) {
if (a ==0) {
return0;
}
// For our first guess, we get the biggest power of 2 which is smaller than the square root of the target.//// We know that the "msb" (most significant bit) of our target number `a` is a power of 2 such that we have// `msb(a) <= a < 2*msb(a)`. This value can be written `msb(a)=2**k` with `k=log2(a)`.//// This can be rewritten `2**log2(a) <= a < 2**(log2(a) + 1)`// → `sqrt(2**k) <= sqrt(a) < sqrt(2**(k+1))`// → `2**(k/2) <= sqrt(a) < 2**((k+1)/2) <= 2**(k/2 + 1)`//// Consequently, `2**(log2(a) / 2)` is a good first approximation of `sqrt(a)` with at least 1 correct bit.uint256 result =1<< (log2(a) >>1);
// At this point `result` is an estimation with one bit of precision. We know the true value is a uint128,// since it is the square root of a uint256. Newton's method converges quadratically (precision doubles at// every iteration). We thus need at most 7 iteration to turn our partial result with one bit of precision// into the expected uint128 result.unchecked {
result = (result + a / result) >>1;
result = (result + a / result) >>1;
result = (result + a / result) >>1;
result = (result + a / result) >>1;
result = (result + a / result) >>1;
result = (result + a / result) >>1;
result = (result + a / result) >>1;
return min(result, a / result);
}
}
/**
* @notice Calculates sqrt(a), following the selected rounding direction.
*/functionsqrt(uint256 a, Rounding rounding) internalpurereturns (uint256) {
unchecked {
uint256 result = sqrt(a);
return result + (rounding == Rounding.Up && result * result < a ? 1 : 0);
}
}
/**
* @dev Return the log in base 2, rounded down, of a positive value.
* Returns 0 if given 0.
*/functionlog2(uint256 value) internalpurereturns (uint256) {
uint256 result =0;
unchecked {
if (value >>128>0) {
value >>=128;
result +=128;
}
if (value >>64>0) {
value >>=64;
result +=64;
}
if (value >>32>0) {
value >>=32;
result +=32;
}
if (value >>16>0) {
value >>=16;
result +=16;
}
if (value >>8>0) {
value >>=8;
result +=8;
}
if (value >>4>0) {
value >>=4;
result +=4;
}
if (value >>2>0) {
value >>=2;
result +=2;
}
if (value >>1>0) {
result +=1;
}
}
return result;
}
/**
* @dev Return the log in base 2, following the selected rounding direction, of a positive value.
* Returns 0 if given 0.
*/functionlog2(uint256 value, Rounding rounding) internalpurereturns (uint256) {
unchecked {
uint256 result =log2(value);
return result + (rounding == Rounding.Up &&1<< result < value ? 1 : 0);
}
}
/**
* @dev Return the log in base 10, rounded down, of a positive value.
* Returns 0 if given 0.
*/functionlog10(uint256 value) internalpurereturns (uint256) {
uint256 result =0;
unchecked {
if (value >=10**64) {
value /=10**64;
result +=64;
}
if (value >=10**32) {
value /=10**32;
result +=32;
}
if (value >=10**16) {
value /=10**16;
result +=16;
}
if (value >=10**8) {
value /=10**8;
result +=8;
}
if (value >=10**4) {
value /=10**4;
result +=4;
}
if (value >=10**2) {
value /=10**2;
result +=2;
}
if (value >=10**1) {
result +=1;
}
}
return result;
}
/**
* @dev Return the log in base 10, following the selected rounding direction, of a positive value.
* Returns 0 if given 0.
*/functionlog10(uint256 value, Rounding rounding) internalpurereturns (uint256) {
unchecked {
uint256 result = log10(value);
return result + (rounding == Rounding.Up &&10** result < value ? 1 : 0);
}
}
/**
* @dev Return the log in base 256, rounded down, of a positive value.
* Returns 0 if given 0.
*
* Adding one to the result gives the number of pairs of hex symbols needed to represent `value` as a hex string.
*/functionlog256(uint256 value) internalpurereturns (uint256) {
uint256 result =0;
unchecked {
if (value >>128>0) {
value >>=128;
result +=16;
}
if (value >>64>0) {
value >>=64;
result +=8;
}
if (value >>32>0) {
value >>=32;
result +=4;
}
if (value >>16>0) {
value >>=16;
result +=2;
}
if (value >>8>0) {
result +=1;
}
}
return result;
}
/**
* @dev Return the log in base 256, following the selected rounding direction, of a positive value.
* Returns 0 if given 0.
*/functionlog256(uint256 value, Rounding rounding) internalpurereturns (uint256) {
unchecked {
uint256 result = log256(value);
return result + (rounding == Rounding.Up &&1<< (result <<3) < value ? 1 : 0);
}
}
}
Contract Source Code
File 18 of 21: Ownable.sol
// SPDX-License-Identifier: MIT// OpenZeppelin Contracts (last updated v4.9.0) (access/Ownable.sol)pragmasolidity ^0.8.0;import"../utils/Context.sol";
/**
* @dev Contract module which provides a basic access control mechanism, where
* there is an account (an owner) that can be granted exclusive access to
* specific functions.
*
* By default, the owner account will be the one that deploys the contract. This
* can later be changed with {transferOwnership}.
*
* This module is used through inheritance. It will make available the modifier
* `onlyOwner`, which can be applied to your functions to restrict their use to
* the owner.
*/abstractcontractOwnableisContext{
addressprivate _owner;
eventOwnershipTransferred(addressindexed previousOwner, addressindexed newOwner);
/**
* @dev Initializes the contract setting the deployer as the initial owner.
*/constructor() {
_transferOwnership(_msgSender());
}
/**
* @dev Throws if called by any account other than the owner.
*/modifieronlyOwner() {
_checkOwner();
_;
}
/**
* @dev Returns the address of the current owner.
*/functionowner() publicviewvirtualreturns (address) {
return _owner;
}
/**
* @dev Throws if the sender is not the owner.
*/function_checkOwner() internalviewvirtual{
require(owner() == _msgSender(), "Ownable: caller is not the owner");
}
/**
* @dev Leaves the contract without owner. It will not be possible to call
* `onlyOwner` functions. Can only be called by the current owner.
*
* NOTE: Renouncing ownership will leave the contract without an owner,
* thereby disabling any functionality that is only available to the owner.
*/functionrenounceOwnership() publicvirtualonlyOwner{
_transferOwnership(address(0));
}
/**
* @dev Transfers ownership of the contract to a new account (`newOwner`).
* Can only be called by the current owner.
*/functiontransferOwnership(address newOwner) publicvirtualonlyOwner{
require(newOwner !=address(0), "Ownable: new owner is the zero address");
_transferOwnership(newOwner);
}
/**
* @dev Transfers ownership of the contract to a new account (`newOwner`).
* Internal function without access restriction.
*/function_transferOwnership(address newOwner) internalvirtual{
address oldOwner = _owner;
_owner = newOwner;
emit OwnershipTransferred(oldOwner, newOwner);
}
}
Contract Source Code
File 19 of 21: SignedMath.sol
// SPDX-License-Identifier: MIT// OpenZeppelin Contracts (last updated v4.8.0) (utils/math/SignedMath.sol)pragmasolidity ^0.8.0;/**
* @dev Standard signed math utilities missing in the Solidity language.
*/librarySignedMath{
/**
* @dev Returns the largest of two signed numbers.
*/functionmax(int256 a, int256 b) internalpurereturns (int256) {
return a > b ? a : b;
}
/**
* @dev Returns the smallest of two signed numbers.
*/functionmin(int256 a, int256 b) internalpurereturns (int256) {
return a < b ? a : b;
}
/**
* @dev Returns the average of two signed numbers without overflow.
* The result is rounded towards zero.
*/functionaverage(int256 a, int256 b) internalpurereturns (int256) {
// Formula from the book "Hacker's Delight"int256 x = (a & b) + ((a ^ b) >>1);
return x + (int256(uint256(x) >>255) & (a ^ b));
}
/**
* @dev Returns the absolute unsigned value of a signed value.
*/functionabs(int256 n) internalpurereturns (uint256) {
unchecked {
// must be unchecked in order to support `n = type(int256).min`returnuint256(n >=0 ? n : -n);
}
}
}
Contract Source Code
File 20 of 21: Strings.sol
// SPDX-License-Identifier: MIT// OpenZeppelin Contracts (last updated v4.9.0) (utils/Strings.sol)pragmasolidity ^0.8.0;import"./math/Math.sol";
import"./math/SignedMath.sol";
/**
* @dev String operations.
*/libraryStrings{
bytes16privateconstant _SYMBOLS ="0123456789abcdef";
uint8privateconstant _ADDRESS_LENGTH =20;
/**
* @dev Converts a `uint256` to its ASCII `string` decimal representation.
*/functiontoString(uint256 value) internalpurereturns (stringmemory) {
unchecked {
uint256 length = Math.log10(value) +1;
stringmemory buffer =newstring(length);
uint256 ptr;
/// @solidity memory-safe-assemblyassembly {
ptr :=add(buffer, add(32, length))
}
while (true) {
ptr--;
/// @solidity memory-safe-assemblyassembly {
mstore8(ptr, byte(mod(value, 10), _SYMBOLS))
}
value /=10;
if (value ==0) break;
}
return buffer;
}
}
/**
* @dev Converts a `int256` to its ASCII `string` decimal representation.
*/functiontoString(int256 value) internalpurereturns (stringmemory) {
returnstring(abi.encodePacked(value <0 ? "-" : "", toString(SignedMath.abs(value))));
}
/**
* @dev Converts a `uint256` to its ASCII `string` hexadecimal representation.
*/functiontoHexString(uint256 value) internalpurereturns (stringmemory) {
unchecked {
return toHexString(value, Math.log256(value) +1);
}
}
/**
* @dev Converts a `uint256` to its ASCII `string` hexadecimal representation with fixed length.
*/functiontoHexString(uint256 value, uint256 length) internalpurereturns (stringmemory) {
bytesmemory buffer =newbytes(2* length +2);
buffer[0] ="0";
buffer[1] ="x";
for (uint256 i =2* length +1; i >1; --i) {
buffer[i] = _SYMBOLS[value &0xf];
value >>=4;
}
require(value ==0, "Strings: hex length insufficient");
returnstring(buffer);
}
/**
* @dev Converts an `address` with fixed length of 20 bytes to its not checksummed ASCII `string` hexadecimal representation.
*/functiontoHexString(address addr) internalpurereturns (stringmemory) {
return toHexString(uint256(uint160(addr)), _ADDRESS_LENGTH);
}
/**
* @dev Returns true if the two strings are equal.
*/functionequal(stringmemory a, stringmemory b) internalpurereturns (bool) {
returnkeccak256(bytes(a)) ==keccak256(bytes(b));
}
}
Contract Source Code
File 21 of 21: UpdateableOperatorFilterer.sol
// SPDX-License-Identifier: MITpragmasolidity ^0.8.13;import {IOperatorFilterRegistry} from"./operator-filter-registry/IOperatorFilterRegistry.sol";
import"./Authorizable.sol";
/**
* @title UpdateableOperatorFilterer
* @notice Abstract contract whose constructor automatically registers and optionally subscribes to or copies another
* registrant's entries in the OperatorFilterRegistry.
* @dev This smart contract is meant to be inherited by token contracts so they can use the following:
* - `onlyAllowedOperator` modifier for `transferFrom` and `safeTransferFrom` methods.
* - `onlyAllowedOperatorApproval` modifier for `approve` and `setApprovalForAll` methods.
*/abstractcontractUpdateableOperatorFiltererisAuthorizable{
errorOperatorNotAllowed(address operator);
addressconstant DEFAULT_OPERATOR_FILTER_REGISTRY_ADDRESS =address(0x000000000000AAeB6D7670E522A718067333cd4E);
addressconstant DEFAULT_SUBSCRIPTION =address(0x3cc6CddA760b79bAfa08dF41ECFA224f810dCeB6);
IOperatorFilterRegistry public OperatorFilterRegistry =
IOperatorFilterRegistry(DEFAULT_OPERATOR_FILTER_REGISTRY_ADDRESS);
constructor() {
if (address(OperatorFilterRegistry).code.length>0) {
OperatorFilterRegistry.registerAndSubscribe(
address(this),
DEFAULT_SUBSCRIPTION
);
}
}
modifieronlyAllowedOperator(addressfrom) virtual{
// Allow spending tokens from addresses with balance// Note that this still allows listings and marketplaces with escrow to transfer tokens if transferred// from an EOA.if (from!=msg.sender) {
_checkFilterOperator(msg.sender);
}
_;
}
modifieronlyAllowedOperatorApproval(address operator) virtual{
_checkFilterOperator(operator);
_;
}
function_checkFilterOperator(address operator) internalviewvirtual{
// Check registry code length to facilitate testing in environments without a deployed registry.if (address(OperatorFilterRegistry).code.length>0) {
require(
OperatorFilterRegistry.isOperatorAllowed(
address(this),
operator
),
"operator is not allowed"
);
}
}
/**
* @notice update the operator filter registry
*/functionupdateOperatorFilterRegistry(address operatorFilterRegisterAddress)
externalonlyOwner{
OperatorFilterRegistry = IOperatorFilterRegistry(
operatorFilterRegisterAddress
);
}
}